功能

• ATSAMD21 ARMR CortexR-M0+ Microcontroller
• The ATSAMD21 ARMR CortexR-M0+ microcontroller is a SMART ARM-based microcontroller developed for migration. You can use the same peripheral modules, 16 compatible codes, the same linear address maps, and pin-compatible migration paths across all devices in the SMART series.　The microcontroller also supports a capacitive touch button, slider, and wheel user interface.
• ATSAMD21 Microcontroller Features and Benefits; in-system programmable flash; 12 channel direct memory access; 12 channel Atmel event system; Up to 52 I/O pins; 32 bit real-time clock and calendar; Up to 5 16 bit timers/counters (TC); Up to 3 24 bit timers/counters (TCC); 1 Full-Speed USB 2.0 Integrated Host/Device Interface; 2-pin serial wire debugging (SWD) program/debugging interface